近期专利介绍

逆作法施工地下工程“四顶一”、“八顶一”交错掏土法本施工方案是，先将两层结构柱以钻孔灌注的方法一次成孔，一次吊放钢筋笼，一次灌注成型，但在板梁柱节点处按高度在孔内填满中砂，把柱混凝土分成两段，以便以后节点施工。在浇完顶板后，在顶板覆盖下充分利用未扰动...     

HIGH-CURRENT PULSED ELECTRON BEAM: RAPID SURFACE ALLOYING AND WEAR RESISTANCE IMPROVEMENT

The present paper reports the rapid surface alloying induced by the bombardment of high-current pulsed electron beam. Two kinds of substrate materials were examined to show this effect. The first sample was a pure Al metal pre-coated with fine carbon powders prior to the bombardment, and the second alloy is the D2-Crl2MolVl mould steel pre-coated with Cr, Ti, and TiN powders. The surface elements diffuse about several micrometers into the substrate materials only after several bombardments. Tribological behaviors of these samples were characterized and significant improvement in wear resistance was found. Finally, a TEM analysis reveals the presence of stress waves generated by coupled thermal and stress fields, which was considered as the main cause of the enhanced properties.     

A Study of the Next Generation Intelligent Networks Interworking with IP Networks

A Study of the Next Generation Intelligent Networks Interworking with IP Networks     

A Study of the Techniques of Automatic Abstracting and Knowledge Acquisition Systems

A Study of the Techniques of Automatic Abstracting and Knowledge Acquisition Systems     

Performance of High Speed Coherent Optical Communication Systems

Ｐｅｒｆｏｒｍａｎｃｅｏｆｈｉｇｈｓｐｅｅｄｃｏｈｅｒｅｎｔｏｐｔｉｃａｌｃｏｍｍｕｎｉｃａｔｉｏｎｓｙｓｔｅｍｓｈａｓｂｅｅｎｉｎｖｅｓｔｉｇａｔｅｄ．Ａｎｏｖｅｌｆｒｅｑｕｅｎｃｙｔｒａｃｋｉｎｇ／ｌｏｃｋｉｎｇａｕｔｏｍａｔｉｃａｌｆｒｅｑ...     

THE FACTORS AFFECTING THE PRODUCTIVITY OF HORIZONTAL WELLS

ＴＨＥ　ＦＡＣＴＯＲＳ　ＡＦＦＥＣＴＩＮＧ　ＴＨＥ　ＰＲＯＤＵＣＴＩＶＩＴＹ　ＯＦ　ＨＯＲＩＺＯＮＴＡＬ　ＷＥＬＬＳＴＨＥＦＡＣＴＯＲＳＡＦＦＥＣＴＩＮＧＴＨＥＰＲＯＤＵＣＴＩＶＩＴＹＯＦＨＯＲＩＺＯＮＴＡＬＷＥＬＬＳ￥ＨｕＤｏｎｇ－ｈｕｉ；ＹａｎＪ...     

Evaluation of hexavalent chromium extraction method EPA method 3060A for soils using XANES spectroscopy

Hexavalent chromium (Cr(VI)) occurrence in soils is generally determined using an extraction step to transfer it to the liquid phase where it is more easily detected and quantified. In this work, the performance of the most common extraction procedure (EPA Method 3060A) using NaOH-Na(2)CO(3) solutions is evaluated using X-ray absorption near edge structure spectroscopy (XANES), which enables the quantification of Cr(VI) directly in the solid state. Results obtained with both methods were compared for three solid samples with different matrices: a soil containing chromite ore processing residue (COPR), a loamy soil, and a paint sludge. Results showed that Cr(VI) contents determined by the two methods differ significantly, and that the EPA Method 3060A procedure underestimated the Cr(VI) content in all studied samples. The underestimation is particularly pronounced for COPR. Low extraction yield for EPA Method 3060A was found to be the main reason. The Cr(VI) present in COPR was found to be more concentrated in magnetic phases. This work provides new XANES analyses of SRM 2701 and its extraction residues for the purpose of benchmarking EPA 3060A performance.     

道听途说

江米条:空调开了吗?剧务:打昨儿起,知道您要来录节目就没敢关,一直开着。江米条:啊?那也太费电了,赶紧关了!剧务:(小声嘻咕)它这没事儿吧!导播:1号线,切进来!江米条:喂,您好!感谢您这么热的天还打电话进来。美国一女子遗弃35只小猫被判在树林里挨冻一晚上据《泰晤士报》8日报道,俄亥俄州湖郡26岁的家庭主妇米歇尔·默里原以为,她会因为遗弃了35只小猫,而被判以短期监禁。但法官的判决却是让她在     

宛如一阵旋风——德国牧羊犬

在这次拍摄之前,我从来没有见过黑色的德国牧羊犬,甚至也想象不出它们的样子。直到拍摄那天,阳光暖暖洒在身上,天很高很蓝,在旷野上,黑色的德国牧羊犬像一道闪电一样,忽一下子出现在眼前,只觉得一阵眩晕……